html,
body {
    margin: 0;
    padding: 0;
}

body {
    background-color: #f2f3f5;
    padding: 15px;
}

.layui-form {
    width: 450px;
}

.layui-input-block {
    position: relative;
}

#show_1,
#show_2,
#show_3 {
    display: inline-block;
    position: absolute;
    top: 12px;
    right: 8px;
    height: 15px;
    width: 15px;
    background-color: #f2f3f5;
    line-height: 23px;
    text-align: center;
    font-size: 20px;
    cursor: pointer;
}